Binding energies of hypernuclei and Λ-nuclear interactions. Revision

Variational Monte Carlo calculations have been made for the s-shell hypernuclei and also of /sub Λ/9Be with a 2α + Λ model. The well depth is calculated variationally with the Fermi hypernetted chain method. A satisfactory description of all the relevant experimental Λ separation energies and also of the Λp scattering can be obtained with reasonable TPE ΛN and ΛNN forces and strongly repulsive dispersive ΛNN forces which are preferred to be spin dependent. We discuss variational calculations for /sub ΛΛ/6He and /sub ΛΛ/10Be with α + 2Λ and 2α + 2Λ models, and the results obtained for the ΛΛ interaction and for /sub ΛΛ/6He from analysis of /sub ΛΛ/10Be. Coulomb effects and charge symmetry breaking in the A=4 hypernuclei are discussed. 28 refs